Answers

The best time to take fuchsia cuttings is when they make new growth in the spring, you can take them now, if you can find a non flowering shoot, put it in a pot of peat, I loosely cover mine with a plastic bag, and keep them out of the sun. This goes for hardy and non hardy fuchsias.

It is a bit late but i've always taken thickish (half to a whole pencil thick) shoots in early to late August with great success. Even though the ones i take are pretty hardy when mature I find young cuttings do not surve outdoors and sometimes even in a cold frame.

Just before the first frosts I bring them indoors in a a very well lit spot on a south facing windowledge in an unheated bedroom and virtually all survive.

I find autumn cuttings much less likely to strike than spring ones, but they will all need winter protection until they get a bit bigger.
Annual fuchsias aren't actually annuals, just not hardy enough to withstand a British winter. You can keep them ticking over indoors or you can bring them indoors and let them dry off almost completely. The leaves will fall and you should keep them in a cool but frost free room. Because they have no leaves they don't need to be in a good light. In about March bring them into a warmer light place, cut back the dead stems to about half and start watering. Spraying the branches with water helps too.
The original branches may grow leaves or all the new growth may come from the base.

The perennials, or hardy ones can be left outside as long as the soil doesn't freeze so if they must be in pots its better to bring them in. If you can plant them in the ground or sink the pots in the ground put them with the crowns about four inches down to protect them from frost.